API reference for Queen SDK for iOS V6.1.0API reference for Queen SDK for iOS V2.3.0, V2.4.0, V2.5.0, and V2.6.0API reference for Queen SDK for iOS V2.2.0API reference for Queen SDK for iOS V2.1.0API reference for Queen SDK for iOS V2.0.0API reference for Queen SDK for iOS V1.9.0API reference for Queen SDK for iOS V1.8.0API reference for Queen SDK for iOS V1.7.0API reference for Queen SDK for iOS V1.6.0API reference for Queen SDK for iOS V1.5.0API reference for Queen SDK for iOS V1.4.0API reference for Queen SDK for iOS V1.3.0API reference for Queen SDK for iOS V1.2.0API reference for Queen SDK for iOS V1.1.3